Grinding attachment for automatic button-machines.



A. F. KEFFLO.

GRINDING ATTACHMENT FOR AUTOMATIC BUTTON MACH1NES. APPLICATION FILED MAY I3. 1916.

1,205,453 Patented Nov 21, 1916.

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A-.F. KEFFLO. GRINDING ATTACHMENT FOR AUTOMATIC BUTTON MACHINES.

APPLICATION FILED MAY 13. 1916.

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I UNITED STATES PATENT onricn.

. ALBERT F. KEFFLO, F MUSCATINE, IOWA.

GRINDING ATTACHMENT FOR AUTOMATIC BUTTON-MACHINES.

Application filed May 13, 1916.

Too whom it may concern Be it known that I, ALBERT F. KEFFLO, a citizen of the United States, residing at Muscatine, in the county of Muscatine and State of Iowa, have invented certain new and useful Improvements in Grinding Attachments for Automatic Button-Machines;

. blanks are carried in chucks, traveling in an endless series, and adapted to present the blanks successively to grinding and drilling devices.

The present invention provides novel means whereby the button blanks may be ground or faced so as to have flat or convexed faces; and to enable machines of the character mentioned to be operated at higher speed; and these objects are accomplished by means of a novel attachment or improve ment in such machines, which attachment in brief 7 comprises a horizontally disposed grinding disk located adjacent one end of the orbital path of the chucks, and adapted to operate upon a plurality'of blanks held in different chucks as the latter travel past and around the disk, said disk being so located relative to the line of travel of the chucks that the blanks held in the chucks will be subjected to the action of the grinding disk for a suflicient time to insure the desired cutting or dressing of the faces of the blanks without overheating the same; and means are provided whereby the said grinding disk may be adjusted both vertically and laterally so as to operate properly upon blanks for any desired thickness and size of lines- In such machines the chucks travel to and from the grinding disk at a rate of from forty-five to fifty per minute; but by arranging the disk adjacent to one end of the orbit of the chucks and substantially concentric with such end of the orbit, the chucks will move circumferentially of the disk for part of their travel, and can be subjected to the action thereof a sufiicient time to enable the disk to properly face the blanks without undue heating thereof.

I will explain one practical embodiment of the invention in detail, with reference to Specification of Letters Patent.

Patented Nov. 21, 1916.

Serial No. 97,305.

the same; and summarize in the claims theessential features and combinations of parts for which protection is desired.

In said drawings: Figure 1 is a side elevation of a part of a well known type of button-blank facing and drilling machine, with my novel button blank grinding or facing attachment applied thereto. Fig. 2 is an enlarged vertical sectional view of such attachment. Fig. 3 is an enlarged detail plan view of such grinding attachment looking down on line 3-3 Fig. 2. Fig. 4 is a detail.

The machine to which my novel attachment is applied may be of any suitable kind, but is preferably one of the so-called automatic button machines, and as shown has an endless series of connected chuck holders C, arranged to travel in an orbital path and operated by suitable means on preferably vertically disposed shafts journaled in the main frame. On one of said shafts adjacent one end of the path is usually mounted a body carrying a rotary series of drills D adapted to operate upon the button blanks B held in chucks E carried in the holders C; such drills operating upon the blanks B held in the chucks as they travel by and beneath the series of drills. Adjacent the other end of the orbital path of the chucks is a shaft A which usually carries tools for facing the blanks in the chucks as they move around the shaft.

In applying my invention to a machine of the automatic type indicated in Fig. l; I remove the devices heretofore employed on such machines for facing or grinding the blanks, and place on the shaft A a slidable sleeve 1, (see Fig. 2) provided at its lower end with a bearing flange 1 and supported upon a collar 2, which may be slidably suspended on the shaft Aby means of a pin 2 passing through a slot 2 in shaft A (Fig. l) and connecting the ring with a rod 2 lying within an axial bore in the shaft A, and preferably extending above the top of said'shaft and having its upper end threaded and engaged by a hand nut 2; so that by turning said nut the collar 2 and sleeve 1 may be adjusted vertically on shaft A. To the flange 1 of sleeve 1 is attached one end of a radially disposed bar 3 the other end of which is fastened to a lug 3 on a split sleeve 3, which is clamped on a shaft 4 suspended rigidly from the upper portion of the frame F, as indicated in the drawings, adjacent and parallel with the shaft A. The sleeve 3 is preferably split and provided with ears 3 at opposite sides of the split, which ears are engaged by bolts 3 to securely clamp the sleeve 3 on shaft 4. To the upper end of the sleeve 1 is fastened a collar 1 to which is rigidly connected one end of a bar 3 the other end of which may be also rigidly connected to a lug 3 on sleeve 3. The bars 3 3 form practically a rlgid connection between the sleeves 1 and 3.

It will be observed by reference to Fig. 3 that the bore of sleeve 1 is of larger diameter than the shaft A, so that said sleeve 1 can be adjusted transversely or eccentrically of shaft A by rocking the sleeve 3; and it can be held in any adjusted position by clamp ing sleeve 3 on shaft 4. The desired eccentric lateral adjustment of the sleeve 1 relative to the shaft A may be effected by means of bolts 4 tapped through opposite lugs 4; on a collar 1 fixed on shaft 4-; the bolts 4 lying on opposite sides on a stud 3 rising from the lug 3 on sleeve 8. Rotatably mounted upon the sleeve 1 is a disk 5 preferably having an annular groove 5 in its under side in which is secured a grinding ring or disk 6, of carborundum or other suitable abrasive material, which ring projects below the lower face of the disk 5 and may be retained in place by any suitable means, as by an annular plate 5 secured to the under side of the disk by screws 5. The disk 5 may be rotatably supported upon the flange 1 of the sleeve, and suitable antifriction bearings (not shown) may be used to support the disk on the flange 1. To disk 5 is connected a belt pulley 5 which may be driven by a belt 7 from a pulley 7 on the usual driven shaft of the machine; I

so that the grinding disk may be rotated at the desired speed when the machine is in operation. The grinding ring (3 is of such sizeand so located that it can simultaneously operate upon a number of blanks 13 held in the chucks E as they move around shaft A. The chucks may be elevated by the usual cam track T, as they come beneath the grinding disk so that the ring 6 will properly operate upon and face each blank as it passes around the disk, and while such blanks are moved around the abrasive disk by the chucks the blanks are also gradually fed upwardly toward the disk by means of the guide or cam track T, upon which the chucks are supported as usual in this type of machine, thus enabling the disk to gradually reduce the blanks to the desired thickness and surface contour, as they travel past the disk. The diameter of the ring 6 is such that it will preferably coincide with or only be slightly eccentric to the are or circle traversed by the chucks in passing around the shaft A, or to that portion of the orbital travel of the chucks concentric to the shaft A. The disk 6 rotates on an axis that is relatively stationary to the chucks, and the latter travel therepast; and a large horizontally disposed abrasive disk or ring can simultaneously operate upon a number of blanks and can also operate upon each blank if desired during nearly 130 degrees of travel of the blank holding chucks around the disk; and this enables the speed of the machine to be greatly accelerated, as compared with the speed of a machine having only the ordinary means for facing the blanks. As the bore of sleeve 1 is larger in diameter than the shaft A, said sleeve can be adjusted laterally of shaft A, or swung in an are having the shaft 4 as its pivot; and the disk 6 can thus be adjusted eccentrically to the shaft A. The sleeve 1 can be held in any desired position by clamping the sleeve 3 to the shaft t after the parts have been properly adjusted. The grinding disk can be adjusted to compensate for wear of the grinding ring and to enable the disk to operate efiiciently and properly upon any desired size or line of blanks.

hat I claim is: j

1. In a-button grinding machine the com bination of a vertically disposed shaft, a

blank holding chuck and means for traveling the blank holding chuck around said shaft, a grinding disk adjustable on said shaft, means for adjustingthe disk laterally of the shaft, and means for rotating the disk.

2. In. a button grinding machine the combination of a vertically disposed shaft, a blank holding chuck and means for traveling the blank holding chuck around said shaft, a sleeve adjustable on said shaft, means for adjusting the sleeve laterally of the shaft, a grinding disk rotatably supported on said sleeve, and means for rotating the disk on the sleeve.

3. En a button grinding machine the combination of an endless series of chucks adapted to hold the blanks, means for traveling the series of chucks, a grinding disk located adjacent and within the orbit of the chucks, a hollow shaft, a sleeve surrounding the shaft on which sleeve the disk is journaled, means for vertically adjusting the sleeve, and means for adjusting the sleeve laterally of the shaft so as to place the grinding disks more or less eccentric to the orbital path of the travel of the chucks.

4. In a button grinding machine the combination of a vertically disposed shaft, a

blank holding chuck and means for traveling a blank holding chuck around said shaft, c.

a sleeve vertically adjustable on said shaft, a grinding disk rotatably supported on said sleeve, a second shaft, a sleeve adjustable thereon, means for clamping the latter sleeve upon its shaft, rigid connections between the said sleeves whereby when said first named sleeve is adjusted the eccentricity of the grinding disk with reference to the blank holding chuck will be adjusted, and means for rotating the disk.

5. In a button grinding machine the combination of a vertically disposed shaft, a blank holding chuck and means for traveling the blank holding chuck around said shaft, a sleeve vertically adjustable on said shaft, a second shaft, a sleeve adjustable thereon, means for clamping the latter sleeve upon its shaft, rigid connections between the said sleeves whereby when said first named sleeve is adjusted the eccentricity of the grinding disk with reference to the blank holding chuck will be adjusted, means for adjusting the first sleeve laterally of the shaft which it surrounds, a grinding disk rotatably supported on said sleeve and means for rotating the disk on the sleeve.

6. In a button grinding machine the combination of an endless series of chuck holders, blank holding chucks therein, a shaft adjacent one end of the orbital travel, of the series of chucks and concentric to such travel, a sleeve surrounding said shaft and adjustable eccentric thereto, a second shaft adjacent the first, a sleeve in said second shaft, rigid connections between said sleeves whereby when said first named sleeve is adjusted the eccentricity of the grinding disk with reference to the blank holding chuck will be adjusted, a grinding disk rotatably mounted on the first sleeve and means for rotating said disk.

7. In a button grinding machine the combination of an endless series of chuck holders, blank holding chucks therein, a vertical shaft adjacent one end of the orbital travel of the series of chucks and concentric to such travel, a sleeve surrounding said shaft and adjustable eccentric thereto, means for adjusting said sleeve vertically of said shaft, a second shaft adjacent the first, a sleeve adapted to be clamped on said shaft, rigid connections between said sleeves whereby when said first named sleeve is adjusted the eccentricity of the grinding disk with reference to the blank holding chuck will be adjusted, a grinding disk rotatably mounted on the first sleeve, and means for rotating said disk.

8. In a. button grinding machine, a grinding disk having a pulley on one face, an annular channel in its other face, and an abrasive ring confined in said channel.

9.-A button grinding attachment for antomatic button machines comprising a shaft,

a sleeve adjustably mounted upon a shaft, a disk rotatably mounted on said sleeve having a pulley on one face and a grinding ring attached to its other face, and means for adjusting said sleeve.

' 10. In a button grinding machine the combination of a shaft, a sleeve surrounding said shaft, a grinding disk rotatably mounted on the sleeve, means for rotating said disk, and a rod extending through the shaft for adjusting the sleeve.

11. A button grinding attachment for automatic button machines comprising .a member, a shaft adjacent thereto, a disk rotatably mounted on said member, a pulley attached to said disk, a grinding ring attached to the disk, a sleeve adapted to be clamped to said shaft, and rigid connections between the sleeve and the member for adjusting the disk laterally.

12. A button grinding attachment for antomatic button machines comprising a shaft, a sleeve mounted upon said shaft, a rod extending through the shaft for adjusting the sleeve vertically, a disk rotatably mounted on said sleeve, a grinding ring attached to the disk, a split sleeve adapted to be clamped to a shaft adjacent the first shaft, and rigid connections between the said split sleeve and the first sleeve for adjusting the latter laterally of its shaft.

13. A button grinding attachment for antomatic button machines comprising a shaft, a sleeve adj ustably mounted upon said shaft, a disk rotatably mounted on said sleeve, a pulley attached to said disk, a grinding ring attached to the disk, a second sleeve adapted to be clamped to a shaft adjacent the first shaft, rigid connections between the second sleeve and the first sleeve for adjusting the latter laterally of its shaft.

14. In a button grinding machine the combination of an endless series of chuck holders, blank holding chucks therein, a shaft adjacent one end of the orbital travel of the series of chucks and concentric to such travel, a sleeve surrounding said shaft disk, and a rod extending through the first shaft and connected with said sleeve for adjusting the latter vertically.

In testimony that I claim the foregoingas my own, I affix my signature.

ALBERT F. KEFFLO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 03 

